[Q] Usb tethering and wifi hotspot not working in AT&T htc one x+

Few days back i have updated my HOX+ with 4.2.2 and sense 5.everything is working fine but my USB TETHERING,Bluetooth tethering and wifi hotspot is not working.i have purchased HOX+ from ebay and i am using it in India.I have read in several thread in XDA that i have to edit telephone.db file.i have tried to find out that file in my phone but i have not got that.Then afterward i came to know that for getting that file in my phone,my phone need to be rooted.then i have installed ROOT CHECKER from play store and it is showing that "this device does not have proper root access".what to do next please explain step by step i am NOOB

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